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MCP1790/MCP1791
4.8 Output Current and Current
Limiting
The MCP1790/MCP1791 devices are tested and
ensured to supply a minimum of 70 mA of output
current.
The MCP1790/MCP1791 also incorporate an output
current limit foldback. When the regulator is in an
overcurrent condition, V OUT will decrease with
increasing load. When V OUT falls below 30% (typical)
of V R , the output current will start to fold back. The
output current will fold back to less than 100 mA
The 5.0V regulator has an overload current limiting of
approximately 120 mA. If V REG is lower than 3.5V, I OUT
will start to fold back and decrease along with V REG
until I OUT is less than 105 mA and V REG is near 0 volts.
The 3.3V regulator has an overload current limiting of
approximately 130 mA. If V REG is lower than 2.5V, I OUT
will start to fold back and decrease along with V REG
until I OUT is less than 99 mA and V REG is near 0 volts.
(typical) when V OUT is near 0 volts.
ESR Curves
10
Instable
1
Stable only
with Tantalum or
Electrolytic cap.
Stable with
Tantalum,
0.1
Instable
Electrolytic and
Ceramic cap.
0.01
Instable
0.001
0.1
1
10
100
1000
Load Capacitor [uF]
FIGURE 4-3:
DS22075B-page 16
ESR Curves for Load Capacitor Selection.
? 2010 Microchip Technology Inc.
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相关代理商/技术参数
MCP1791T-3302E/DC 制造商:Microchip Technology Inc 功能描述:; Input Voltage Primary Max:30V; Output
MCP1791T-3302E/ET 功能描述:低压差稳压器 - LDO HI VLTG LDO 50 mA RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MCP1791T-5002E/DC 功能描述:低压差稳压器 - LDO HI VLTG LDO 50 mA RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MCP1791T-5002E/ET 功能描述:低压差稳压器 - LDO HI VLTG LDO 50 mA RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MCP-18 制造商:Taiyo Electric Ind. 功能描述:
MCP1801T-0902E/OT 制造商:Microchip Technology Inc 功能描述:HIGH PSRR 150 MA LDO, VIN 10V MAX, VOUT =0.9V SOT-23-5-TR - Tape and Reel
MCP1801T-0902I/OT 功能描述:低压差稳压器 - LDO Hi PSRR 150 mA LDO Vin 10V maxVout 0.9V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MCP1801T-1202I/OT 功能描述:低压差稳压器 - LDO Hi PSRR 150 mA LDO Vin 10V maxVout 1.2V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20